Complicated work relationship / crush

I am interested in a guy at work. I am in a position higher than him, but I am new. He has worked there for quite a while. We started flirting immediately and he asked me to dinner. We spent a wonderful evening together and even enjoyed a long, passionate kiss at the end of the night. After that, we flirted heavily at work (when we where alone). Then, after a week, he simple STOPPED replying to my texts. He still flirted, but I assumed he lost interest because he didn't pursue anything outside of work. I stopped flirting back. After a week and a half, he asked if I cared if he flirted with me and asked if it made me feel uncomfortable. Of course I said no. At this point, I assumed maybe he thought I was being clingy with all the texts I had sent him, so I replied to his concern by saying that I just wanted him to know that I didn't want anything serious and I just wanted to have fun. He said he didn't know what he wanted just yet and that he DID like me. Happily, I started flirting with him at work again. TWO weeks go by, and he still hardly replies to my texts and calls, but still flirts with me at work. Frustrated and encouraged by my drunk friends, I texted him exactly what was on my mind: "Are you insecure?". As my friends had pointed out to me, I was in a higher position, I was more educated, and when he exposed his vulnerabilities about his past relationship to me on the first date, I still remained closed and still have not shown any vulnerabilities to him. This may seem intimidating and may make him feel insecure. He replied with a "Um, kind of." As you can imagine, our conversation didn't last long. 3 days later, at work, he asked if I wanted to grab a late lunch with him after work. Relieved, I said yes. As I was getting ready to leave, he said that he wasn't that hungry after all and abruptly left without a rain check or an explanation. Now, before I continue, I do admit that I am not flirtatious at work. I simply enjoy his flirting with me and I smile when he does. I very rarely go out of my way to flirt with him first. Maybe this is making him think that I'm not interested? Plus, him being intimidated of me? He's such a great guy and I really don't want to be the reason nothing further happens. What should I do?

Well, there is really nothing you can do. It's not your move. You can't do anything, but you could tell him that you life him for who he is ... If that's the truth. Haha. Tell him that it doesn't matter if your position is higher than his, you like him because you enjoy his company and the way he makes you feel. Basically, make him feel comfortable. :)